I had a problem come up recently with my ADSB receiver that eventually got traced to the VP-X power system. I got a caution that the ADSB was offline. This is after 30 hours of working fine. (new airplane) I pulled the d-sub connector out of the ADSB rcvr and checked for power with my voltmeter and got 12 volts and checked the continuity of the data lines and they checked fine so I ended up sending the receiver in to Dynon for repair. It came back showing no problems so at this point I was stumped. I rigged up a test tail using a light bulb as a load thinking maybe I had a weak connection in the power wiring. Turns out it was some kind of internal failure in the VP-X. That circuit would show 12 volts until a load hit it, then it went to zero. I switched the circuit on and off several times using the EFIS and a laptop. No joy. I moved the line supplying the ADSB to another pin on the VPX and I'm back in business. Just a heads up that the VP-X failed circuit may show 12 volts on a line under no load but drops to zero when the load hits it. I still like the VP-X but those pesky electrons hurt my head sometimes.
VP-X problem
- Thread starter Boundsie
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